I am also using two AC68U's, one as a router and the other as a media bridge, and am connecting at 702Mbps, the same speed as with 374.501. I am also using 9dBi antennae on both units as well.
My routers are Literally 3 floors apart (im in a 4 story townhouse),
Edit;
I disabled NAT Acceleration, and my link speed went from 104Mbps to 175.5Mbps!!
Edit 2;
Network Map Tab on Media Bridge (ac68) shows a steady 175.5Mbps. But when i check Wireless log and refresh it every second, the link speed (Stations List) is all over the place; Its any where from 1Mbps to 117Mbps.
When i check the Wireless Log on the main router (ac68) and check the Stations List; the link speed is a freaking mess. The PC that is hard wired in to the Media Bridge, still shows a WiFi signal, a TX/RX rate and a -dmb signal level.
Im going back to beta firmware 501 and wait for firmware .905.
Asus, i always liked your products, but this is just too funny to be mad at.
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Edit 3;
Disabling Turbo QAM, improves and stabilizes link speed between the router ac68 and the media bridge ac68. The links speed is now at a steady 195Mbps.
Stations List in Wireless Log shows a steady Tx Rate 175.5Mbps and Rx Rate 216.7Mbps. I can safely conclude that Turbo QAM is broken in this new firmware.
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